Description:

Freeplane is a premier free and open source software application that
supports thinking, sharing information and getting things done at
work, in school and at home. The core of the software is tools for
mind mapping (also known as concept mapping or information mapping)
and using mapped information.

Freeplane is a Freemind fork. FreePlane fully supports the FreeMind
file format, but adds features and tags not supported by FreeMind
which are ignored on loading.